Well, there's
(1) knowing what you need to know, and
(2) memorising some arcane gibberish for the exam and forgetting it the next day.
The Air Law exam has by far the largest quotient of (2).
If a new PPL knows "I'm OK for now, but I'd better suss out the details before the two years is up" he's not done anything wrong, yet. (Remember, depending on how old you are two years could be quite a long time, plus when you're taking Air Law it hasn't really crossed your mind yet that you really will end up with the licence one day!)
He'd have scored more points by remembering to look it up in LASORS, and even more points by being able to make head or tail of what it says in LASORS ... but asking here in good time is at least lots better than not asking here and just letting the two years pass by surely to goodness.